package xiaojun.JAVA.view;

import java.util.Scanner;

public class MainView {
    public static final String Menu = """
            *******************
                 RBAC系统
            *******************
            |  0   退出系统     |
            |  1   部门管理     |
            |  2   角色管理     |
            |  3   用户管理     |
            *******************
            请输入选项：""";

    public static Scanner input;
    private static MainView singleton;

    static {
        input = new Scanner(System.in);
    }

    private final DeptView deptView;
    private final RoleView roleView;
    private final UserView userView;

    private MainView() {
        deptView = DeptView.getInstance();
        roleView = RoleView.getInstance();
        userView = UserView.getInstance();
    }

    public static MainView getInstance() {
        if (singleton == null) {
            singleton = new MainView();
        }
        return singleton;
    }

    public void show() {
        String menuChoice;

        do {
            System.out.println(Menu);
            menuChoice = input.nextLine();
            switch (menuChoice) {
                case "0" -> System.out.println("成功退出系统，欢迎再次使用！");
                case "1" -> deptView.show();
                case "2" -> roleView.show();
                case "3" -> userView.show();
                default -> System.out.println("输入非法，请输入正确的菜单编号");
            }
        } while (!"0".equals(menuChoice));
        input.close();
    }

}
